Overview
The 74HCT238DB,112 is a high-speed Si-gate CMOS 3-to-8 line decoder/demultiplexer produced by Nexperia USA Inc. This component is part of the 74HCT series and is pin compatible with Low-Power Schottky TTL (LSTTL) devices. It accepts three binary weighted address inputs (A0, A1, A2) and, when enabled, provides eight mutually exclusive active HIGH outputs (Y0 to Y7). The device features three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3), allowing for easy parallel expansion to a 1-to-32 decoder configuration with minimal additional components.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Type Number | 74HCT238DB,112 | - |
| Package | SSOP16 (SOT338-1) | - |
| Supply Voltage (VCC) | 4.5 - 5.5 | V |
| Logic Switching Levels | TTL | - |
| Output Drive Capability | ± 4 | mA |
| Propagation Delay (tpd) | 18 | ns |
| Operating Temperature Range | -40 to +125 | °C |
| High-Level Input Voltage (VIH) | 2.0 | V |
| Low-Level Input Voltage (VIL) | 0.8 | V |
| High-Level Output Voltage (VOH) | 4.4 | V |
| Low-Level Output Voltage (VOL) | 0.1 | V |
| Quiescent Current (ICC) | 8 | µA |
| Input Capacitance (CI) | 3.5 | pF |
Key Features
- High-speed Si-gate CMOS technology
- Pin compatible with Low-Power Schottky TTL (LSTTL) devices
- Three binary weighted address inputs (A0, A1, A2)
- Eight mutually exclusive active HIGH outputs (Y0 to Y7)
- Three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3)
- Easy parallel expansion to a 1-to-32 decoder configuration
- Operating temperature range from -40°C to +125°C
- Low power dissipation
- RoHS compliant
Applications
- Digital decoding and demultiplexing in various electronic systems
- Parallel expansion for larger decoder configurations
- Automotive and industrial control systems
- Communication and data processing equipment
- General-purpose logic circuits requiring high-speed decoding and demultiplexing
Q & A
- What is the primary function of the 74HCT238DB,112?
The primary function is to act as a 3-to-8 line decoder/demultiplexer.
- What are the logic switching levels of the 74HCT238DB,112?
The logic switching levels are TTL (Transistor-Transistor Logic).
- What is the output drive capability of the 74HCT238DB,112?
The output drive capability is ± 4 mA.
- What is the propagation delay of the 74HCT238DB,112?
The propagation delay is approximately 18 ns.
- What is the operating temperature range of the 74HCT238DB,112?
The operating temperature range is from -40°C to +125°C.
- How many enable inputs does the 74HCT238DB,112 have?
The device has three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3).
- Is the 74HCT238DB,112 RoHS compliant?
- What package type is the 74HCT238DB,112 available in?
The component is available in an SSOP16 (SOT338-1) package.
- What is the supply voltage range for the 74HCT238DB,112?
The supply voltage range is from 4.5 V to 5.5 V.
- Can the 74HCT238DB,112 be used for parallel expansion?
